Dam gate



Feb. 23, 1943.

J, KALlX DAM GATE Filed Feb. 9, 1942 PRESSURE 2 1 SUPPLY INVENTOR fi ATTORNEYS Patented Feb. 23, 1943 UNITED STATES PATENT OFFICE (Granted under the act of March 3, 1883, as amended April 30, 1928; 3'70 0. G. 757) 1 Claim.

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to improvements in dam gates such as is described in my copending application Serial No. 425,508, filed January 3, 1942.

It is an object of this invention to provide an improved gate reces that will eliminate vibration and chattering as well as objectionable noise.

These and other objects of my invention will become apparent upon a consideration of the following description and the accompanying drawing, in which:

Figure 1 is a horizontal cross-section of the gate in the gate recess;

Fig. 2 is a vertical cross-section illustrating my improved chatter preventer.

Referring to Figs. 1 and 2, it will be seen that I have provided a guided fiat bar I3 arranged within the gate recess and which is of sufiicient length to overlap several rollers of the gate, The bar I3 is provided with rounded ends l4 and I5 and carries pistons l6 arranged to operate in cylinders ll embedded in the upstream side of the gate recess. The pistons I6 are interconpressure admitted to the pipe l9, building up pressure within the cylinders I! whereby the bar l3, through the action of the pistons I6, is forced against the gate, holding it firmly in place. The

valve 20 may then be closed, maintaining the pressure in the cylinders ll. When it is desired to raise the gate, the valve 20 is opened to exnected by pipes l8 to the main pipe 19, the top haust, relieving the pressure in the cylinders IT and accordingly the pressure of the bar [3 against the gate, whereby it may be raised with a minimum of resistance. It is obvious that the valve 20 may be interconnected in any desired fashion with the hoisting mechanism so that its operation is automatic.

While I have illustrated a particular embodiment of my invention it is to be understood tht I do not wish to be limited to the particular details and arrangement disclosed since various modifications within the spirit of the invention will suggest themselves to one skilled in the art.

Having described my invention, what I claim as new and wish to secure by Letters Patent is:

Gate locking mechanism for gates having antifriction bearings comprising a guide bar arranged to contact a plurality of said bearings, a piston carried by said bar, and means to exert a pres sure against the piston head, whereby said guide bar is caused to exert a pressure against the contac ted gate bearings and to force the opposite bearings into contact with a side of the gate recess.

JOHN KALIX. 

